Blender 2.8 Animation, Bake Action, is it broken?
After tinkering with this here's how I work with Baking Actions:
Once you have all your edits layered as NLA tracks and you are ready to bake down to one replace layer:
Make sure that the New layers under the Animation Data tab on the right of NLA editor is set to Replace.
In pose mode, Select all the Controls of our rig, or all bones.
go to Pose > Animation >Bake Action.
In the settings use "Selected Controls" it is way faster.
Also make sure Visual Keying is on
Remove constraints if you are trying to bake animation onto a constrained object. otherwise you can leave it checked off.
When you run the Bake Action script you should get a flattened replace track of your baked animation.
If you are having issues with this, feel free to ask for clarification !